Cultivator.



W. GOELDNER.

cumvma. APPLICATION FILED IUILYIS. |913.

Patented Mar. 5, 1918.

3 SHEETSSHEET I.

LLI. IIIIIHIIIIIIII n n m n n n W. GOELUNER. CULTIVATOR. APPLICATION FILED JULY 15. ma.

Patente Mar. 5, 1918.

a SHEETS-SHEET 2.

W. GOELDNEH.

CULTIVATOR.

APPLICATION men xuLY ls. |913.

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WALTER GEIJDNER, OF MANNHEIM, GERMANY, ASSIGNOR TO THE FIRM OF HEINRICH LANZ, OF MANNHEIM, GERMANY.

CULTIVATOR.

Application filed July 15, 1913.

To all whom t may concern.'

Be it known that I, vWALTER Gonnnnnn, subject of the King of Prussia, residing 22 Augusta-r1nlage, Mannheim, in the German Empire, have invented certain new and useful improvements in Cultivators, of which the following is a specication.

This invention relates to rotary cultivators or hoes for agricultural purposes and has for its object to provide a cultivator or hoe which will uniformly break up and loosen the whole surface of the ground over which it travels.

A further object of the present invention is to provide a construction wherein coniparatively little resistance is offered by the ground to the hoe carriers or arms, thus enabling the greater part. of the power to be transmitted to the hoe blades.

Another object of the invention is to facilitate the reversal of the hoe blades when it is desired to reverse the direction of rotation of the hoe shaft.

The invention further relates to an iur proved construction of hoe for rotary cultivators so that a better cut is obtained and the soil more uniformlyT breken up and turned over, while stalks, roots,'manure, and the like are thoroughly worked into the ground. v

The invention also relates to the construction of the hoe blades and carrier arms therefor, all as hereafter described and set forth in the appended claims.

In order that t 1e invention may be clearlyT understood reference is made to the a ,companying drawings whereon Figure 1 is a fragmentary section through the rotary cultivator and Fior. 2 a fragmentary front view thereof.

Figs. 3, 4 and 5 are side views of dierentl forms of hoe blade, showing the carrier arm attached thereto.

Figs. 6, 7 and S are plan views of the hoe blade and carrier arm illustrated in Figs. 3,v 4 and 5 respectively and Figs. 9, 10 and 11 are end views corresponding to Figs. 3, 4f and 5.

Fig. 12 is an end view showing a modified form of eultivator and Fig. 13 is a fragmentary front view of the cultivator shown in Fig. 12.

Figs. li'and 15 are views corresponding Specicaton of Letters Patent.

Patented Mar. 5, 1918;

serial No. 779,156.

to Figs. 12 and 13 showing a further modifi-l cation.

Fig. 16 is a view showing the sheet-metal blank from which a further modified form of cultivator blade is constructed, Figs. 17 and 18 being front and edge views respec-v tively of the blade constructed from the blank illustrated in Fig. 16, while Fig. 19 is an edge view in the direction of the arrow A in Fig. 17.

Figs. 2O to 23 are views corresponding to Figs. 16 to 19, showing a slightly modified form of cultivator blade.

Referring firstly to Figs. 1 and 2 which illustrate a rotary cultivator adapted to uniformly break up and loosen the whole ground over which the cultivator travels and which is so constructed that when cutting at medium depths the disks and arms carryingthe hoes do not enter the ground, whereas when a deep cut is being made, the arms carrying' the hoes, although entering the ground, require to meet only a very slight resistance as the preceding hoe blade loosens the ground in front of the carrier arm. Y

a designates the cultivator shaft upon which are mounted a plurality of disks 1, b2, 3, o5, etc., to which the hoe blades are secured. The hoe blades are preferably scoop-shaped and provided with doublecutting edges so as to cut in either direction of motion. As illustrated in Figs. 8, 6 and 9 the hoe blades (l are preferably semicircular in cross-section and secured to a U-shaped strap c, the arms c1 and c2 of which are secured to the disks 1 to o5, etc., in such a manner that the hoe blades CZ are arranged helically around the cultivator shaft and so that each hoe blade overlaps the path of the preceding hoe blade, thus preventing theL formation of independent furrows in thev ground. The hoe blades Z may have either rounded cutting edges (Z1 as illustrated in Figs. 3, G and 9 or pointed cutting edges Z2 as illustrated in Figs. 4l, 7 and 10.. If desired, however, the hoe blades may be angular in cross-section as illustrated in Figs. 5, 8 and 11 and not only provided with inclined cutting edges Z3 at the front and rear but also terminate at the front and rear in aciculated ground piercers d? as clearly seen inV Figs. 5 and 11. Y

The particular form of the hoe blades illustrated in Figs. 3 to 11 facilitates the breaking-up and loosening of the ground in front of the next succeeding carrier arm c1 or c2 so that the latter meets comparatively little resistance on entering the ground.

In order that each hoe blade may overlap the path of the preceding hoe blade, the hoe blades are mounted in position preferably in the manner illustrated in Fig. 2, the carrier arm c1 of the hoe blade Z5 being secured to the disk 1. While the carrier arm c2 of the same hoe blade is secured to the disk Z13. Similarly the carrier arms of the hoe blade d are secured to the disks b2 and 214 and the carrier arms of the hoe blade (Z7 to the disks b3 and and so on, so that between the earrie-r arms c1 and c2 of each hoe blade there is a disk to which the carrier arm of the next hoe blade is attached.

1t Will of course be understood that in order to obtain a still more uniform cultivation of the Whole surface of the ground over Which the cultivator travels, the hoe blades instead of overlz'tpping` one-half of the path of the preceding hoe blade as in the construction illustrated in Fig. 2, may be arranged to overlap more than half of the path of the preceding hoe blade by attaching the carrier arms of each hoe blade to the lirst and fourth or first and iifth disk or so on, so that tivo or more disks are intermediate the carrier arms of each hoe blade.

The carrier arms c1, c2 as illustrated in Figs. 1 and 2 are secured to the disks 1, b2, Z13, etc., by means of tivo bolts e, f, the carrier arms being adapted to .be turned about the bolt e on removing the bolt ,f and secured in the position illustrated in dotted lines in Fig. 1 on passing the bolt f through the bolt hole g, thus enabling the position of the hoe blades to be reversed When it is dcsired to reverse the direction of rotation of the cultivator shaft a.

Instead of supporting each hoe blade. by means of a double-armed stap as hereinbefore described, the hoe blades may be divided so as to form a pair of hoe blades each supported by a single carrier arm, the blades of each pair being bent toward each other and at an angle to each other as clearly shown in Figs. 12 to 15, so that the hoe blades of each pair practicallyY cross over each other, it being therefore necessary to set one of the hoe blades of each pair slightly in advance of the other.

Referring te Figs. 12 and 13: 1 and 1a designate the hoe blades of each pair, each being carried at the end of an arm 2 secured to the disks b1, b2, b3, etc., the hoe blade 1 of each alternate pair being slightly in advance of the hoe blade 1tL of the same pair and slightly overlapping the path of the hoe blade 1a, the blades 1 and 1a of each pair being bent toward each othel1 and at an angle to each other, as clearly seen in Fig. 13. It will be noted that in this case also each pair of hoe blades overlaps the path of the preceding pair.

Figs. 14 and 15 illustrate a modification of the arrangement illustrated in Figs. 12 and 13. rThe hoe blade 1 on the disk b1 is arranged slightly in advance of the hoe blade 1a of another pair of hoe blades mounted on the same disk b1, so that the hee blade 1 on the disk b1 cuts slightly in advance of the hoe blade 1n on the same disk. As the hoe blade 1 on the disk b1 requires to withstand a greater resistance than the blade 1LL on the same disk, it is desirable to compensate therefor and for this purpose the hoe blades 1 of each'pair are arranged successively7 in advance of and in the rear of the blade 1 on the same disk alternately, as seen in Figs. 1dand 15, Where it Will be seen that the hoe blades 1 on the disks b1 and b3 are in advance of the hoe blades 1a on the same disks, whereas the blade 1a on the disk` Z22 is in the rear of the hoe blade 1 on the same disk.

Figs. 16 to 19 illustrate one form of the improved cultivator blade, Fig. 16 illustrating the sheet1netal blank from which the cultivator blade is produced. As clearly seen in Fig. 16 the blade is cut out to form an irregular ligure 12-345-6, the edges 1-2, 2 3 and 3-4 forming obtuse angles with each other and being beveled to form cutting edges in the usual manner. The blade is secured to the disks on the cultivator shaft by means of bolts passed through the bolt holes h. @n striking the ground a sharp angle open toward the front is thus formed between the ground and the edges 2 3 or 3 4, so that stalks or the like cannot escape toward the rear along the edge 1-2 but are' severed by the cutting edges 2-3 and 3-4- or are forced toward the front and subjected to the action of the next succeeding cut. .as the hoe blade leaves the ground the tivo edges :9J-3 and fJ-i f rm an incline with the ground so that any stalks or the like in front of these edges remain upon the ground and cannot cling to the edge 1--2. The edge :Jr-5 is parallel or substantially parallel to the line a-a aboutu which the outer end of the blade is bent, so that the edge 4-5 does not exert a cut but provides the largest possible turning over surface a-3-l-5-0a thus insuring etlicient turning over of the ground. The line a-a about which the outer end of the blade is bent forms an angle tangent to the circle described by theJ blades, in the usual manner.

The turning over surface a-S-ll--a may be either perfectly flat or suitably curved to increase the turning over eect so as to approximate to the ordinary plou share.

In the modified form of cultivator blade illustrated in Figs. 2O to 23, the blade is formed with three cutting edges 1 2, 2 3 and 3 1 while the edge 4 5 constitutes the back of the blade, the outer end of the blade being bent about the line (o a between the lines z a and 6 6, while the extreme end 5 3-1-6 is substantially at right angles to the plane of the blade.

The cultivator blade illustrated in Figs. 21 to 23 is particularly suitable for deep cutting whereas the blade illustrated in Figs. 1T to 19 is more suitable for preliminary hoeing.

. I claim 1. A rotary cultivator comprising a shaft and a plurality of hoes, comprising hoe blades and carrier arms, arranged helically upon said shaft so that each hoe overlaps at least one-half of the path of the preceding hoe.

2. A rotary cultivator comprising arshaft and a plurality of scoop-shaped hoes arranged helically upon said shaft so that each hoe overlaps a substantial portion of the path of the preceding hoe.

3. A rotary cultivator comprising a shaft and a plurality of hoes of angular cross-section arranged helically upon said shaft so that each hoe overlaps a substantial portion of the path of the preceding hoe.

4. A rotary cultivator comprising aA shaft, a plurality of disks thereon, and a plurality of hoes secured by carrier arms to said disks in such manner that the hoes are arranged helically about the shaft and each is entirely overlapped by one or more of the others.

A rotary cultivator comprising a shaft, a plurality of disks thereon, a plurality of hoes, and members supporting said hoes and secured to said disks in such a manner that hoes secured to disks separated by at lleast one intervening disk substantially meet over the said intervening disk or disks.

(3. A rotary cultivator comprising a shaft, a plurality of disks thereon, a plurality of hoes, and a pair of members supporting each hoe and secured to said disks in such amanner that one of said disks is interposed between each pair of said members so that each hoe overlaps the path of the preceding hoe.

T. A rotary cultivator comprising a shaft, a plurality of dis rs thereon, a plurality of hoes having double cutting-edges, and members supporting said hoes and pivotally secured to said disks so as to enable the adjustment of said hoes relative to said disks according to the direction of rotation of said shaft.

8. A rotary cultivator having elongated scoop-shaped hoes supported on both of their sides.

9. A rotary cultivator having scoopshaped hoes provided with double cuttingedges so as to cut in either direction of motion.

10. A rotary cultivator having scoopshaped hoe blades V-shaped in cross-section.

11. A rotary cultivator having hoes whose blades are V-shaped in cross-section and are supported on both of their sides.

12. A rotary cultivator having hoes V- shaped in cross-section and with acicular ground piercers.

13. A rotary cultivator having scoopshaped hoes provided with double cuttingedges so as to cutin either direction of motion and terminating at the front and rear in acicular ground piercers.

14. A rotary cultivator having holes of angular cross-section terminating at the front and rear in acicular ground piercers.

15. A rotary cultivator having scoopshaped hoes each of which is provided with a central forward projection forming a pointed cutting edge.

16. A rotary cultivator having scoopshaped hoes provided with pointed cutting edges and arranged helically so as to partially overlap each other.

17. A rotary cultivator comprising a shaft, a plurality of disks thereon, and a plurality of hoes secured by carrier arms to said disks, the carrier arm secured to each disk in substantially the same angular position with respect to the shaft as a second carrier arm secured to a non-adjoining disk, in such manner that the hoes are arranged helically and each substantially overlaps the path of another.

In testimony whereof I have ahXed my signature in presence of tWo Witnesses.

WALTER GOELDNER.

Witnesses:

JosErH PFEIFFER, HANS MEYER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patenti Washington, D. C. 

